<template>
  <mu-button class="totop"
    fab
    small
    color="primary"
    @click="retop"
    v-show="show">
    <mu-icon value="arrow_upward"></mu-icon>
  </mu-button>
</template>
<style lang="less" src="./index.less"></style>
<script src="./index.js"></script>
